STUDY DESIGN: This is a single-center, randomized, double-blind, placebo-controlled study to evaluate hyperlipidemic patients on standard lipid-lowering therapy with LDL-C levels exceeding NCEP ATP III goals. Following a 4-week Pre-Randomization Phase with dietary counseling and a 2-week placebo run-in, eligible patients will be randomized (1:1:1) to receive DITPA (90 mg/day, 180 mg/day), or Placebo for a total treatment duration of 12 weeks.